Can a person use a quadratic formula to isolate the square in the process of completing the square?

Expert Answers
crmhaske eNotes educator| Certified Educator

The quadratic formula is arrived at by completing the square; therefore, theoretically one could use it to isolate the square through some simple rearranging:




Therefore, the square is b/(2a)

With some further rearranging, we can arrive at the quadratic in vertex form:




`h=b/(2a)` and` k=(c-b^2/(4a))` , where (h,k) is the vertex of the parabola.